一阶OTA—C滤波器及跨接网络的研究  

Design of the first-order OTA-C filters and Research on OTA-C Crossover Networks

作　　者：马金龙 田福庸 

出　　处：《杭州电子工业学院学报》1995年第3期73-79,共7页Journal of Hangzhou Institute of Electronic Engineering

摘　　要：本文提出了一种使用跨导运放（OTA）和接地电容来实现一阶滤波器的方法，该方法基于信号而图（SFG）和基本OTA－C积木块，能成功设计一阶低通、高通和全通特性的OTA－C滤波器。同时提出用OTA－C来实现跨接网络，这样能使跨接网络非常适合于高额连续时间模拟IC设计制作，并以双路跨接网络为例说明跨接网络的传函特征、OTA－C结构及电路。A method is proposed for the design of the first-order active filters using operational transcondnctance amplifiers (OTA) and grounded capacitors, this method is based on the Signal-Flow Graph (SFG) and the basic building blocks of OTA-C,By means of it,we can sucessfully design the first-order Low-pass. High-pass and All -pass OTA-C filters,this method is simple and intuitive,the number of OTA in the designed circuit is more less. In the paper,we also describe a method to design of Crossover Networks (CN)using OTA-C,So the CN based on OTA-C is very well suited for the high-frequency continuous time analog IC design, in the paper, We describe the 2 -way CN's transfer function and its OTA-C structure and OTA-C circuit of it.

关 键 词：信号流图 滤波器 跨接网络 OTA-C滤波器 

分 类 号：TN713.1[电子电信—电路与系统]